When you work with SDO, you can create one or many structures called data objects, each of which includes business data organized into a collection of named properties.
使用SDO时，可以创建一个或多个名为data objects的结构，每个结构都包含一个组织到命名属性集中的业务数据。
Select the Data TAB under properties, select Advanced, and bind the control to a Request Scope variable named body.
在属性下面，选择data选项卡，选择advanced并将该控件绑定到名为body的Request Scope变量。
It is then simply a matter of adding the properly-named properties to an nt: resource node type, which holds the actual file data.
这个问题很简单，只要给nt： resource节点类型添加命名正确的属性即可，属性包含实际的文件数据。
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